Bissoy.com
Doctors Medicines MCQs Q&A

During Urea hydrolysis pH of the soil system attains a value

During Urea hydrolysis pH of the soil system attains a value Correct Answer 9.0

During Urea hydrolysis pH of the soil, the system attains a value of 9.0.
Urea hydrolysis is a chemical reaction that occurs in soils, to transform the urea in urine into ammonia and bicarbonate, resulting in ammonia volatilization and mineral scaling. The pH is shifted from 6.8 to 9 and is detected by the change of colour of phenol red from light orange to magenta.

Related Questions

N2 content in a urea sample was found to be only 42%. What is the actual urea content of the sample? (molecular weight of urea = 60)
Consider the following statements: 1. When a soil sample is dried beyond its shrinkage limit, the volume of the soil slowly decrease 2. The plastic limit is always lower than the liquid limit for any type of soil 3. At the liquid limit, the soil behaves like a liquid and possesses no shear strength at all 4. When subjected to drying, the volume of the soil remains unchanged once the water content of the soil goes below its shrinkage limit Which of the above statements are correct? 
A teacher is trying to introduce her class VII students to different kinds of soil. She begins by introducing the names of three kinds of soil i.e. sandy soils, clayey soil and loamy soil. She explains the properties of each soil in term of its particulate nature. She then demonstrates one sample of each kind of soil and shows the students the difference in percolation rate of an examples. How would you evaluate this approach from an inquiry oriented perspective?
Consider the following statements and choose the correct answer:
1. Average density of soil is 2.65 gms. per ml.
2. The spaces present between soil particles in a given volume of soil are called pore spaces
3. Porosity of the soil decreases with the increase in the percentage of organic matter in the soil
4. Macro-pore spaces have little water holding capacity and allow free movement of moisture and air in the soil under normal condition
Urea hydrolysis in the soil produces
The question below consists of a set of labelled sentences. These sentences, when properly sequenced form a coherent paragraph. Select the most logical order of sentences from among the options. P: The depletion of organic nutrients in the soil has reached alarming proportions, thanks to indiscriminate use of chemical fertiliser in Green Revolution areas. Q: As against an acceptable level of ‘soil organic carbon’ of well over 5 percent, soils in Punjab are said to have levels far below 1 percent. R: Besides, 5.3 billion tonnes of soil is eroded annually, at a rate of 16.4 tonnes/hectare. S: The nutrient imbalance has been skewed by the overuse of urea (N) vis-a-vis phosphatic (P in chemical parlance) and potassic (K) fertiliser.
The below question contains a paragraph of 6 sentences. The first and the sixth sentences are given in the beginning and end and numbered 1 and 6 respectively. The four sentences in the middle are jumbled and labelled P, Q, R and S. Identify the proper order of these four sentences and mark the correct option. 1. Soil is an invaluable natural resource. P. On the other hand, the type of soil determines the flora and fauna of the region. Q. The soil and the living organisms of a region are inter-dependent. R. On the one hand, soil is affected by the flora and fauna of the region. S. It provides raw materials for the plants on which we depend for food. 6. Consequently, do-age to the soil will destroy the balance of nature.
Consider the following statements about adding organic manures to the soil A. They make the soil rigid so as to hold the plants firmly. B. They add inorganic matter to the soil which is considered very rich in plant nutrient. C. They improve the texture of the soil. D. They enhance the water holding capacity of the soil. The correct statements are:
Consider the following statements. a) The Soil found in maximum part of Rajasthan is Aridisols and Entisols. b) Red soil is present in Udaipur and Dungarpur. c) Usara soil is the soil which is located nearby mountain ranges. d) Hadoti Region has Black soil. Which of the statement/statements given above is/are correct?
Which of the following is/are correct about the Black soil? I- Black soil is also known as regur soil II-Black soil has high water retaining capacity III-Most of the Deccan is occupied by Black soil.